Justin

Newest questions and responses by Justin
  1. Math

    Write the power of 10 to multiply the divisor by to make it a whole number. Then, write the equivalent problem and find the quotient 16.65 ÷ 0.37

    asked on January 14, 2019
  2. chemistry

    what is the characteristic wavelength of an electron (in nm) that has a velocity of 5.97 X 10^6 ms^-1 (me=9.11 X 10^-31kg)?

    asked on November 26, 2018
  3. Math

    Dan has twice as many stickers as Cam does. If Dan gives Cam 15 of his stickers he will still have 22 more than Cam. How many stickers does each boy have?

    asked on November 19, 2018
  4. Chemistry

    What sort of particles does iodine contain

    asked on October 12, 2018
  5. math

    Rewrite the expression without using a negative exponent. -2m^-5 Simplify the answer as much as possible.

    asked on September 18, 2018
  6. Physics

    A car travelling at 30m/s overcomes a frictional resistance of 100N while moving. Calculate the power developed by the engine.[1hp=0.75]

    asked on September 2, 2018
  7. social studies

    How are the todays badlands different from the same area millions of years ago?

    asked on May 30, 2018
  8. math

    if a lion spends about 5/6 of their day sleeping, how many hours does a lion sleep???

    asked on April 11, 2018
  9. Chemistry

    A sample of a new plant food, "super gro", was analyzed. Determine the amount of grams of P and P2O5 as well as the percentage of P2O5 in a sample of "super gro". Mass of plant food sample: 12.50 grams Mass of MgNH4PO46H2O recovered: 8.93 grams

    asked on April 6, 2018
  10. Social studies

    13. Why was Berlin airlift necessary when the Soviet Union isolated West Berlin A. East Berlin had no resources to help West Berlin B. The three nations that controlled West Berlin were not allies C. West Berlin had no access to a river D. West Berlin was

    asked on March 26, 2018
  11. social studies

    Why are New York,Boston, and Philadelpia important cities

    asked on March 6, 2018
  12. Algebra 2 Sine Graphing

    A sine function has the following key features: Period=4pi Amplitude: 2 Midline y=3 Y intercept; (0,3) The function is a reflection of its parent function over the x axis.

    asked on January 23, 2018
  13. Physics Prob.

    A 22.0 kg child plays on a swing having support ropes that are 2.00 m long. A friend pulls her back until the ropes are 45.0 ∘ from the vertical and releases her from rest. What is the potential energy for the child just as she is released, compared with

    asked on November 24, 2017
  14. Economics

    A perfectly competitive painted necktie industry has a large number of potential entrants. Each firm has an identical cost structure such that long-run average cost is minimized at an output of 20 units . The minimum average cost is $10 per unit. Total

    asked on November 5, 2017
  15. Economics

    A perfectly competitive painted necktie industry has a large number of potential entrants. Each firm has an identical cost structure such that long-run average cost is minimized at an output of 20 units . The minimum average cost is $10 per unit. Total

    asked on November 5, 2017
  16. Biology

    Plz i need help. Plants are green because the pigments in plants reflect green light. Blue and red light give them the most energy to power photosynthesis. You are conducting an experiment to see how different colors of light affect the growth of plants.

    asked on September 28, 2017
  17. Science

    What is a factor that limits a technological design? A. a prototype B.a trade-off C.a constraint D.a patent

    asked on September 14, 2017
  18. Chemistry

    When 20.0mL of 1.40M solution of calcium nitrate is mixed with 70.0mL of 0.234M potassium iodate, a precipitate Ca (IO3)2 is formed. Calculate the concentrations of both NO3- and IO3- before mixing and after mixing

    asked on July 6, 2017
  19. Chem

    When 20.0mL of 1.40M solution of calcium nitrate is mixed with 70.0mL of 0.234M potassium iodate, a precipitate Ca (IO3)2 is formed. Calculate the concentrations of both NO3- and IO3- before mixing and after mixing.

    asked on July 6, 2017
  20. spanish 3

    escribe la forma del verbo indicado en el tiempo indicado. yo / tener / future

    asked on May 26, 2017
  21. Math

    The original price for a pair of sneakers was $70. John bought them on sale for 25% off. The sales tax was 6%. How much did John pay for the sneakers, including sales tax? A $16.80 B $18.55 C $52.50 D $55.65

    asked on May 22, 2017
  22. LANGUAGE ARTS

    The topic is asking to research clothing in the Victorian period and then relate it to a Christmas carol and compare to today. Please help?

    asked on May 17, 2017
  23. Math

    A typical around a track in the United States has a length of 440 yards. How many laps would need to be completed to run a mile

    asked on April 27, 2017
  24. Math

    1. Graph the points A ( -5,0) B ( -4, 3) and C ( 0, -4) A B C D 2. Identify the quadrant in which (3, -6) lies A II B IV C I D III 3. Determine which ordered pair is a solution of y = 2x - 3 A ( -2, 7) B ( 0, 3) C ( -4, -11 D ( 5, -7 5. Graph the linear

    asked on March 23, 2017
  25. Science

    How are earth and Venus similar? How is Venus different from Earth? Provide two similarities and two differences.

    asked on March 16, 2017
  26. Science

    Explain what Maria and craters are and how they formed.

    asked on January 31, 2017
  27. Geometry

    Which of the following represents a chord but not a diameter of the circle? A. TR B. SN C. PM D. SM

    asked on January 20, 2017
  28. Algebra

    Barb is making a bead necklace. She strings 1 white bead, then 3 blue beads, then 1 white bead, and so on.Write the numbers for the first eight beads that are white.What is the rule for the pattern

    asked on January 5, 2017
  29. Geometry

    A 20 meter long cable is used to support a telephone pole, holding it perpendicular to the ground. If the cable forms a 60 degree angle with the ground, how high up the pole should the cable be attached?

    asked on December 12, 2016
  30. Science

    You are pushing a friend on a sled. You push with a force of 20N. Your friend and the sled together have a mass of 60kg. Ignoring friction, what is the acceleration of your friend on the sled?

    asked on December 12, 2016
  31. Calculus III

    Hi, this question is about Langrange multipliers. Given f(x,y) = y^2 - x^2, subject to the constraint g(x,y) = 0.25x^2 + y^2 = 1, find the max and mins. So I found the partial derivatives for both f(x,y) and g(x,y): fx = -2x fy = 2y gx = 0.5x gy = 2y And

    asked on December 11, 2016
  32. Calculus III

    Hi, this question is about Langrange multipliers. Given f(x,y) = y^2 - x^2, subject to the constraint g(x,y) = 0.25x^2 + y^2 = 1, find the max and mins. So I found the partial derivatives for both f(x,y) and g(x,y): fx = -2x fy = 2y gx = 0.5x gy = 2y And

    asked on December 10, 2016
  33. language arts

    Could you check my answer please..thank you Which of the following sentences contain a linking verb? A. Teresa wore her favorite shoes today. B. Her shoes look really comfortable.xxx C. She put them on with striped socks. Teresa walked for hours without a

    asked on December 10, 2016
  34. language arts

    Could you check my answer please..thank you Which of the following sentences contains a linking verb? A. Yesterday, Sarah experienced rock climbing for the first time.xxx B. Sarah seemed nervous at first. C. She climbed very well for a beginner. D. I think

    asked on December 10, 2016
  35. Calculus III

    Hi, this question is about Langrange multipliers. Given f(x,y) = y^2 - x^2, subject to the constraint g(x,y) = 0.25x^2 + y^2 = 1, find the max and mins. So I found the partial derivatives for both f(x,y) and g(x,y): fx = -2x fy = 2y gx = 0.5x gy = 2y And

    asked on December 10, 2016
  36. Algebra

    I need help understanding how to cross-multiply addition of inverse functions. I'm given this, 1/p+1/(p-45) = 1/30 The answer goes to p^2-105p+1,350 = 0. My method has been adjusting the ratios of the numerator and denominators to give,

    asked on December 6, 2016
  37. Ray Optics

    Hi, this is about thin film interference in ray optics. My book presents two similar problems, but somehow uses different paths for the same variable. I'll list out the given variables: --Problem A-- n1 < nf > n2, delta phase is therefore lambda over two.

    asked on December 6, 2016
  38. General Physics II

    Hi, this is about thin film interference in ray optics. My book presents two similar problems, but somehow uses different paths for the same variable. I'll list out the given variables: --Problem A-- n1 < nf > n2, delta phase is therefore lambda over two.

    asked on December 5, 2016
  39. 6th grade math

    My question is: Between which two whole integers is -0.5. how do I explain this

    asked on December 5, 2016
  40. art

    Could you please check my answer please...thank you Which of the following is the best evaluation of the artwork based on the criterion that the piece feature imaginary creatures or things. 1. The artwork is successful because it features a fully clothed

    asked on December 1, 2016
  41. math

    how many sets of 4 are there in sets of 24?

    asked on November 30, 2016
  42. Math

    Let (7,-3) be a point on the terminal side of theta. Find the exact values of sin of theta, csc of theta and cot of theta?

    asked on November 29, 2016
  43. Math

    If one hundredths is divided into ten equal parts, each part is one (BLANK )

    asked on November 13, 2016
  44. pre algebra

    2.5x10^-5 equals what?

    asked on November 7, 2016
  45. Math

    n/-3 + 5 > 4= Have to explain all of the steps...every time I do it I come out with a different answer. Please I am totally lost on this one...Thank you.

    asked on November 2, 2016
  46. art

    The math tessellations: unit 4 1. The architectural design was created by: 1. using an organic pattern in the form of tessellation. 2. using a geometric pattern in the form a tessellation. 3. using no definite pattern and placing shapes randomly. 4. using

    asked on October 21, 2016
  47. science

    Which of the following can be used to explain why fossils of the same kinds of organisms can be found in different regions of the world? biogeography adaptation continental drift dispersal I think it is dispersal..but not sure..thank you for your help.

    asked on October 19, 2016
  48. Biology 20

    I'm using chromatography to identify compounds in a leaf extract for a lab, and one of the evaluation questions is 'Suggest a step that could be added to the procedure to isolate a specific compound for chemical testing.' What step could I use?

    asked on October 6, 2016
  49. Organic Chemistry

    Hi, I'm trying to fix an incorrect IUPAC name of a molecule. It is given as trisecbutylmethane, and I have to draw it out to correct it. Here's the thing: how do I draw incorrect IUPAC name? I can't wrap my mind around it. What I have drawn out is a

    asked on September 29, 2016
  50. Calculus III

    Topic: Quadric surfaces. I have two homework problems, and they are quite a doozy for me. So the point is, I am given details of a quadric surface on the Cartesian coordinate system, and thus have to use the data to construct an equation through it.

    asked on September 18, 2016
  51. math

    Shalina uses the expression 3x to determine the cost of x notebooks. What is the cost of 24 notebooks?

    asked on August 23, 2016
  52. General Physics

    A 2.3 kg block is initially at rest on a horizontal frictionless surface when a horizontal force in the positive direction of an x axis is applied to the block. The force is given by F with arrow(x) = (2.6 − x^2) N, where x is in meters and the initial

    asked on July 16, 2016
  53. Physics

    Five masses are positioned as follow in the x and y axis: m1 = 1 kg at (0,0) m2 = 2 kg at (4,0) m3 = 3 kg at (4,5) m4 = 4 kg at (0, 5) m5 = 5 kg at (2, 2) All x and y values are in meters. Find the magnitude and direction of the net gravitational force

    asked on July 14, 2016
  54. Physics

    A 4.0-kg mass is placed at (3.0, 4.0) m, and a 6.0-kg mass is placed at (3.0, -4.0) m. What is the moment of inertia of this system of masses about the x-axis?

    asked on July 7, 2016
  55. General Physics

    Clarification: this is calculus-based physics, so the methodology is not restricted to trigonometry only. I have two questions, so hopefully I can divide them up nice and evenly. Also, if you know where I should copy and paste proper vector notation from,

    asked on June 23, 2016
  56. World History

    Who names himself dictator during the late Republic and early Empire?

    asked on May 19, 2016
  57. World History

    How did the Punic Wars effect the Roman Army?

    asked on May 19, 2016
  58. World History

    1. What island did Rome gain control of as a result of the first Punic War? A: Sicily B: Corsica C: Mediterranean D: None of the above

    asked on May 19, 2016
  59. Math

    Find the first 4 terms in the expansion of ((3x^4)-(2/y^5))^9

    asked on May 13, 2016
  60. Science-Physics

    As shown below, a 2.00 kg mass is connected to an unknown mass m via a massless rope and a massless, frictionless pulley. The mass m is on a ramp angled 20 degrees above the horizontal. The coefficients of kinetic and static friction are μk=0.35 and

    asked on May 13, 2016
  61. Pre Algebra (Math)

    A certain animal can go for a long period of time without drinking water. When it does drink, its body weight can increase by 40%. Suppose the animal weighs 80 pounds after a long period without water. How many pounds can the animal gain when it drinks?

    asked on May 5, 2016
  62. Physics

    A 4.00-kg block rests on a 30.0° incline. If the coefficient of static friction between the block and the incline is 0.700, what magnitude horizontal force F must act on the block to start it moving up the incline, given g= 9.80m/s^2?

    asked on May 5, 2016
  63. chemistry

    If the water in 500mL of 0.44M NaCl solution is evaporated, what mass of NaCl will remain?

    asked on April 26, 2016
  64. Calculus II

    So I'm trying to integrate a function using partial fractions. Here is the integral of interest: ∫(3x^2+5x+3)/[(x+2)(x^2+1)]dx. Since the numerator's degree of the polynomial is lesser than that of the denominator's degree, it is clear to separate.

    asked on April 25, 2016
  65. Calculus II

    So I have Maclaurin series for sinx = ∑(-1)^n[x^(2n+1)]/(2n+1)!. I need to write out new series for sin(x^2). This will be equivalent to squaring the whole Maclaurin series of sinx, right? I'm just confused as to what terms are squared, and thus what the

    asked on April 25, 2016
  66. science

    the solubility of an unknown substance is 120 grams of water at 70 degrees celsius. What is it?

    asked on April 20, 2016
  67. chemistry

    What is the molarity of the following solutions? A. 0.96 g MgCl2 in 500 mL solution B. 9.33 g Na2S in 450 mL solution C. 2.48 g CaF2 in 375 mL solution

    asked on April 8, 2016
  68. chemistry

    When 23g of C8H18 is combusted at STP, how many liters of carbon dioxide is produced?

    asked on April 4, 2016
  69. Science /bio

    Any foods or fruits highest in glucose?

    asked on February 28, 2016
  70. Art

    what idea did the halos on the heads of Pichore's main subjects emphasize A) plentiful wisdom •• B) Exceptional power C) Divine connection D) extraordinary creativity Correct me

    asked on February 19, 2016
  71. Chemistry

    Okay so I understand this is incredibly unconventional, but I have a big favor to ask. I just got a chem exam back and my teacher still has not posted my scantron score. I was wondering if it is at all possible for you guys to just spot-check for accuracy.

    asked on February 17, 2016
  72. Math

    Find two numbers which have a sum of 2 and a product of 2. This question is driving me crazy, please help!!

    asked on February 16, 2016
  73. math

    In which quadrant does the angle Θ lie given that Cos Θ > 0 and tan Θ > 0? A. Quadrant I B. Quadrant II C. Quadrant III D. Quadrant IV B?

    asked on February 12, 2016
  74. Chemistry

    A Sample of M2O3 weighing 11.205g is converted to 15.380g of MCL3, where M is the unknown metal, then what is the identity of M?

    asked on February 5, 2016
  75. math

    If sierra swims laps every morning for week . she swims 4/5 of a mile every morning. how many miles does she swim in one week Do i multiply or divide 5/1 x 4/5. please help

    asked on February 4, 2016
  76. Math

    A bag contains 3 blue marbles, 4 red marbles, and 2 white marbles. Three times you draw a marble and return it. Find the probability. P(all white)

    asked on February 1, 2016
  77. Computer Science

    Create a class called Shapes that has a private int field named radius and the proper get- and set- methods (according to our Java coding standards). Create a constructor that takes an integer as a parameter to initialize the radius. Create a void method

    asked on January 29, 2016
  78. math

    grantvilles governor receved 3 times as many votes as carys governor.carysgovernor received 790 votes. how many people voted altogether

    asked on January 14, 2016
  79. stat

    While technology or a​ t-distribution Distribution Table can be used to find the​ area, in this​ problem, technology will be used. Find the​ P-value associated with t t0equals=1.34 and 19 degrees of​ freedom, rounding to three decimal places. Can

    asked on December 13, 2015
  80. Physics

    A 50 gram mass vibrates in SHM at the end of a spring. The amplitude of the motion is 0.12 meters, and the period is T= 1.70 seconds. Find: The maximum acceleration of the mass? The speed of the mass when the displacement is 0.06 meters?

    asked on December 8, 2015
  81. Humanities

    Having trouble answering these questions, about John Kani's film (Nothing but the Truth). 1. How does Mda see memory and identity as being linked? How is this reflected in Kani’s play? 2. How does the play mirror the intentions and role of the Truth and

    asked on December 7, 2015
  82. Physics

    A steel bar has an initial length of 40 meters when the temperature is 20 oC. At what final temperature will the steel bar have a final length of 40.01 meters? The coefficient of linear expansion of steel is 12E-6 (1/C).

    asked on December 6, 2015
  83. Physics

    A 35-g block of ice at -14°C is dropped into a calorimeter (of negligible heat capacity) containing 400 g of water at 0°C. When the system reaches equilibrium, how much ice is left in the calorimeter? The specific heat of ice is 2090 J(kg K) and the

    asked on December 5, 2015
  84. precalc

    Solve: round to the thousandths if necessary! 1) 4^3/4x+5 = 12 2) log(x-1) + log x = log 6 3) 2log(base 4) 5 - log(base 4) x + log(base 4) 3 - log(base 4) 7 = 1/2

    asked on December 2, 2015
  85. Calculus

    Use integration by parts to evaluate the definite integral. S 12 x/sqrt of x+4 dx 0

    asked on November 12, 2015
  86. physics

    The potential energy of a pair of hydrogen atoms separated by a large distance x is given by U(x)=-C(subscript)6/x^6, where C_6 is a positive constant. What is the force that one atom exerts on the other? Is this force attractive or repulse? I've taken the

    asked on November 11, 2015
  87. Chemistry

    Enthalpy I'm given that the heat of reaction for the combustion of ethane is -1560kJ/mol. I need to figure out how much heat is produced from 18g of ethane. 2 C2H6 + 7 O2 --> 4 CO2 + 6 H2O Okay so I'm rough on Thermo right now, so I gave it my best shot.

    asked on November 8, 2015
  88. Chemistry

    Enthalpy I'm given that the heat of reaction for the combustion of ethane is -1560kJ/mol. I need to figure out how much heat is produced from 18g of ethane. 2 C2H6 + 7 O2 --> 4 CO2 + 6 H2O Okay so I'm rough on Thermo right now, so I gave it my best shot.

    asked on November 8, 2015
  89. Chemistry

    Enthalpy I'm given that the heat of reaction for the combustion of ethane is -1560kJ/mol. I need to figure out how much heat is produced from 18g of ethane. 2 C2H6 + 7 O2 --> 4 CO2 + 6 H2O Okay so I'm rough on Thermo right now, so I gave it my best shot.

    asked on November 8, 2015
  90. Calculus 1

    Locate the absolute extrema of the function f(x)=Sinpix on the closed interval [1,1/3]

    asked on November 5, 2015
  91. Calculus

    Evaluate ∫ (cos(x))^(1/2)sin(x)dx Let u = cos(x)? ∫ (u)^(1/2)sin(x)dx = ∫ [2u^(3/2)/3]sin(x)dx ∫ [2cos(x)^(3/2)/3] (-cos(x)) dx? I thought this involved the FTC, but now I'm thinking that's false.

    asked on November 4, 2015
  92. Calculus

    Alright, I want to see if I understand the language of these two problems and their solutions. It asks: If F(x) = [given integrand], find the derivative F'(x). So is F(x) just our function, and F'(x) our antiderivative? 1) F(x) = ∫(2, x)

    asked on November 4, 2015
  93. Calculus

    Use a Riemann sum with n = 3 terms and the right endpoint rule to approx. ∫(1, 2) sin(1/x)dx. My teacher just needs the terms written out, no need to add or multiply. This is a problem she did up on the board, so here's her answer: sin(4/3)(1/3) +

    asked on November 4, 2015
  94. Calculus

    Differentiate to find critical numbers and leave function in fully factored form. g(x) = (x^2+1)^5(x^2+2)^6 g'(x) = (x^2+1)^5[6(x^2+2)^5(2x)] + (x^2+2)^6[5(x^2+1)^4(2x)] g'(x) = 2x(x^2+1)^4(x^2+2)^5[6(x^2+2)(2x) + 5(x^2+1)(2x)] g'(x) =

    asked on October 15, 2015
  95. Math

    My numerator is less than my denominator.I am more than 1/2. What fractions can Ibe

    asked on October 9, 2015
  96. Geometry

    Point D is on the interior of angle ABC. Use the given information to find m angle DBC. (Draw the picture.) M angle ABC = (5x +6) M angle ABD = (7x - 9) M angle DBC = (5x - 6) Answer so far: (5x + 6) + (5x - 6) = (7x - 9) 10x = 7x - 9 10 x - 7x = -9 3x =

    asked on October 6, 2015
  97. Calc

    An airplane is flying at a speed of 350 mi/h at an altitude of one mile and passes directly over a radar station at time t=0. a) Express the horizontal distance d (in miles) that the plane has flown as a function of t. I really don't know... would it be

    asked on October 5, 2015
  98. Calculus

    Finding critical numbers g(theta) = 16(theta) - 4tan(theta) I can only get the derivative of g to be g'(theta) = 16 - 4sec^2(theta). Am I supposed to move on to get sec^2(theta) = 4, then sec(theta) = 2?

    asked on October 4, 2015
  99. Calculus

    We are finding critical numbers f(x)= 8x^3+x^2+8x f'(x)=24x^2+2x+8 -> 2(12x^2+x+4) I'm honestly stuck. All I can tell is that I need to set my f'(x)=0, but I am lost there too. Quadratic form. equates to (-1±i√191)/24 I believe. That is as far as I can

    asked on October 4, 2015
  100. Calculus

    We are finding critical numbers f(x)= 8x^3+x^2+8x f'(x)=24x^2+2x+8 -> 2(12x^2+x+4) I'm honestly stuck. All I can tell is that I need to set my f'(x)=0, but I am lost there too. Quadratic form. equates to (-1±i√191)/24 I believe. That is as far as I can

    asked on October 4, 2015

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